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bfe5787197
This changes `from django.utils.importlib import import_module` to `from importlib import import_module`, as `django.utils.importlib` will be removed in django version 1.9.
100 lines
5.0 KiB
Python
100 lines
5.0 KiB
Python
from __future__ import absolute_import
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from six import text_type, binary_type
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from typing import Any, Dict, Callable, Tuple
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# This file needs to be different from cache.py because cache.py
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# cannot import anything from zerver.models or we'd have an import
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# loop
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from django.conf import settings
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from zerver.models import Message, UserProfile, Stream, get_stream_cache_key, \
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Recipient, get_recipient_cache_key, Client, get_client_cache_key, \
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Huddle, huddle_hash_cache_key
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from zerver.lib.cache import cache_with_key, cache_set, \
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user_profile_by_email_cache_key, user_profile_by_id_cache_key, \
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get_remote_cache_time, get_remote_cache_requests, cache_set_many, \
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to_dict_cache_key_id
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from importlib import import_module
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from django.contrib.sessions.models import Session
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import logging
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from django.db.models import Q
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MESSAGE_CACHE_SIZE = 75000
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def message_fetch_objects():
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# type: () -> List[Any]
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try:
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max_id = Message.objects.only('id').order_by("-id")[0].id
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except IndexError:
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return []
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return Message.objects.select_related().filter(~Q(sender__email='tabbott/extra@mit.edu'),
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id__gt=max_id - MESSAGE_CACHE_SIZE)
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def message_cache_items(items_for_remote_cache, message):
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# type: (Dict[text_type, Tuple[binary_type]], Message) -> None
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items_for_remote_cache[to_dict_cache_key_id(message.id, True)] = (message.to_dict_uncached(True),)
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def user_cache_items(items_for_remote_cache, user_profile):
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# type: (Dict[text_type, Tuple[UserProfile]], UserProfile) -> None
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items_for_remote_cache[user_profile_by_email_cache_key(user_profile.email)] = (user_profile,)
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items_for_remote_cache[user_profile_by_id_cache_key(user_profile.id)] = (user_profile,)
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def stream_cache_items(items_for_remote_cache, stream):
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# type: (Dict[text_type, Tuple[Stream]], Stream) -> None
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items_for_remote_cache[get_stream_cache_key(stream.name, stream.realm_id)] = (stream,)
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def client_cache_items(items_for_remote_cache, client):
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# type: (Dict[text_type, Tuple[Client]], Client) -> None
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items_for_remote_cache[get_client_cache_key(client.name)] = (client,)
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def huddle_cache_items(items_for_remote_cache, huddle):
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# type: (Dict[text_type, Tuple[Huddle]], Huddle) -> None
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items_for_remote_cache[huddle_hash_cache_key(huddle.huddle_hash)] = (huddle,)
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def recipient_cache_items(items_for_remote_cache, recipient):
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# type: (Dict[text_type, Tuple[Recipient]], Recipient) -> None
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items_for_remote_cache[get_recipient_cache_key(recipient.type, recipient.type_id)] = (recipient,)
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session_engine = import_module(settings.SESSION_ENGINE)
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def session_cache_items(items_for_remote_cache, session):
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# type: (Dict[text_type, text_type], Session) -> None
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store = session_engine.SessionStore(session_key=session.session_key) # type: ignore # import_module
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items_for_remote_cache[store.cache_key] = store.decode(session.session_data)
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# Format is (objects query, items filler function, timeout, batch size)
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#
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# The objects queries are put inside lambdas to prevent Django from
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# doing any setup for things we're unlikely to use (without the lambda
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# wrapper the below adds an extra 3ms or so to startup time for
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# anything importing this file).
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cache_fillers = {
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'user': (lambda: UserProfile.objects.select_related().all(), user_cache_items, 3600*24*7, 10000),
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'client': (lambda: Client.objects.select_related().all(), client_cache_items, 3600*24*7, 10000),
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'recipient': (lambda: Recipient.objects.select_related().all(), recipient_cache_items, 3600*24*7, 10000),
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'stream': (lambda: Stream.objects.select_related().all(), stream_cache_items, 3600*24*7, 10000),
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### Message cache fetching disabled until we can fix the fact that it
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### does a bunch of inefficient memcached queries as part of filling
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### the display_recipient cache
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# 'message': (message_fetch_objects, message_cache_items, 3600 * 24, 1000),
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'huddle': (lambda: Huddle.objects.select_related().all(), huddle_cache_items, 3600*24*7, 10000),
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'session': (lambda: Session.objects.all(), session_cache_items, 3600*24*7, 10000),
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} # type: Dict[str, Tuple[Callable[[], List[Any]], Callable[[Dict[text_type, Any], Any], None], int, int]]
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def fill_remote_cache(cache):
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# type: (str) -> None
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remote_cache_time_start = get_remote_cache_time()
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remote_cache_requests_start = get_remote_cache_requests()
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items_for_remote_cache = {} # type: Dict[text_type, Any]
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(objects, items_filler, timeout, batch_size) = cache_fillers[cache]
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count = 0
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for obj in objects():
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items_filler(items_for_remote_cache, obj)
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count += 1
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if (count % batch_size == 0):
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cache_set_many(items_for_remote_cache, timeout=3600*24)
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items_for_remote_cache = {}
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cache_set_many(items_for_remote_cache, timeout=3600*24*7)
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logging.info("Succesfully populated %s cache! Consumed %s remote cache queries (%s time)" % \
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(cache, get_remote_cache_requests() - remote_cache_requests_start,
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round(get_remote_cache_time() - remote_cache_time_start, 2)))
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